Rotary brush



N. E. NIELSEN April 12, 1955 ROTARY BRUSH 3 Sheets-Sheet 1 Filed Jan. 29, 1953 April 12, 1955 N. E. NIELSEN ,705,855

ROTARY BRUSH Y Filed Jan. 29, 1955 3 Sheets-Sheet 2 v \i I April 12, 1955 N. E. NIELSEN ROTARY BRUSH 3 Sheets-Sheet 3 Filed Jan. 29, 1953 United States Patent ROTARY BRUSH Niels E. Nielsen, Summit, N. 1., assignor to Newark Brush Company, Kenilworth, N. 1., a corporation of New Jersey Application January 29, 1953, Serial No. 333,875

Claims. (Cl. 51-193) This invention relates to a member or device for supporting a brush or buff wheel which is made up of bristles of suitable material or cloth that is assembled into a circular disc. Heretofore such brush assemblies have been mounted in various ways for rotation on a shaft that is driven at a speed such that the outer periphery of the bristles or equivalent are travelling at a relatively high rate of speed for different purposes 311151111 as polishing the surface of a device for its final Where the speed on the contact surface of the brush is fast, considerable heat is generated and it is an object of my invention to provide cooling means for the numerous parts of the brush. While various cooling means have been utilized in the past 1 have found after many experiments and tests with prior devices that considerable improvements can be made thereon. It is therefore another object of my invention to provide a new supporting member having improved means for forcing cool air through the numerous parts of the brush. These and other objects will be clear to one familiar with this kind of work, from a reading of the specification taken in connection with the annexed drawing wherein Figure 1 is a plan view on a reduced scale of my improved supporting and cooling member.

Figure 2 is a view on the line 2-2 of Figure 1.

Figure 3 is a view on the line 33 of Figure 1.

Figure 4 is a view on the line 44 of Figure 1.

Figure 5 is a view of a sectional part of the brush showing the adaptation of the supporting and cooling member thereto.

Figure 6 is a fragmentary view somewhat like Figure 5 but showing the air scoops out of axial alignment or in staggered relationship as they are assembled to different brushes mounted on the driving shaft.

Figure 7 is a diagram on a small scale, showing a plurality of brushes having their holders so the air scoops or ducts are in axial alignment.

Figure 8 is a view similar to Figure 7 but illustrating non-axial alignment of the air ducts shown in Figure 6 Figure 9 is a fragmentary view showing the rim and flange portion of the supporting member of Figure 1 overlapping one of the clamping members that holds the bristles together.

Figure 9A is a fragmentary perspective view showing the bearing lugs illustrated in Figures 9 and 1.

Figure 10 is a view on the line 1010 of Figure 5 on an enlarged scale but showing a plurality of unit brushes in assembled relation to make a larger brush.

Figure 11 is a view on line 1111 of Figure 10.

Figure 12 is a view about on line 1212 of Figure 10.

Figure 13 is a view similar to Figure 5 but with cloth used as a buff material.

Referring now to details wherein the like numbers refer to corresponding parts on the various views. The supporting and cooling member carrying the brush or polishing material comprises a disc or circular shaped member having a central body portion 1 with a hub 2 for mounting on a driving shaft 3. The outer periphery of the disc 1 terminates in an annular offset rim 2,705,855 Patented Apr. 12, 1955 ice 4 having a circular flange 5. Forced outwardly from the disc 1 are a plurality of air scoop 6, the formation of which starts at approximately point 7 and continues to the point 8 leaving a supporting edge along the curbed line between the points 8 and 9. Since the discs are made of a preferably stiff material such as steel properly treated to prevent rusting, these formed air scoops 6 will take in air through an opening which may have a maximum width at a point 10 of approximately of an inch, more or less depending upon the type of brush and the work that the same has to do. At the same time that air scoops 6 are formed, the material is forced outwardly across the rim 4 and flange 5 to form an air duct 11 as further shown in Figure 2. As shown in Figures 1, 9 and 9A, bearing hubs 12 are formed in the rim 4 preferably equally spaced between the air ducts 11 where they pass through the rim 4 and flange 5. These bearing lugs 12 engage the inner periphery of the brush unit which is made up of bristles of suitable material or of cloth as shown in Figure 13 which are held together by a pair of clamping rings 13 that are laced in position by clamping links 14 as shown in Figure 9 but since the present invention relates to the structure shown in Figure 1 further description of the brush element is not necessary. Since the bearing lugs 12 project outwardly beyond the outer surface of the rim 4 spaces will be provided between the arcuately positioned bearing lugs 12 which space is crossed by the air passages 11 coming from the air scoops 6.

In Figure 5 a plurality of bristles members with their cooperative supporting and cooling members as shown in Figure l are located in transverse alignment as shown by the diagram in Figure 7. As an alternative the bristle units C with their cooperating supporting member may be assembled so that the air scoops are aligned as shown in Figures 6 and 8.

From the enlarged view shown in Figure 10 and in sections 11 and 12 it will be seen that this new type of supporting and cooling member provides a new and improved means for passing air out through the brush or polishing member regardless of whether or not it is made of bristles C as shown in Figures 5, 6 and 10 or whether cloth C is used as shown in Figure 13. By having a better means of cooling the brush material the life of the same has been greatly increased and a better job is performed on the object being treated by the brush. It is obvious that many of the details of construction may be varied without departing from the spirit of my invention and the scope of the appended claims.

Having thus described my invention, what I claim is:

1. A unit brush supporting and cooling member comprising a disc of suitable material, the disc having a central body portion with means for mounting it on a drive member and an ofiset rim terminating in an annular flange and a plurality of arcuately positioned air scoops formed outwardly on said central portion, the scoops terminating in depressed parts extending across the rim and outwardly in the flange thereby forming an air passage from the scoop to the outer edge of the flange as and for the purposes described.

2. A unit brush supporting and cooling member as set forth in claim 1 further defined in that arcuately positioned bearing hubs are preferably formed outwardly from the outer periphery of the rim for the purpose described.

3. A unit brush supporting and cooling member comprising a single disc of suitable metal, the disc having centrally located means for mounting it on a driving member, said disc having a relatively large body portion terminating in an offset annular rim and the rim having at one edge an offset projecting annular flange, the body portion having a plurality of arcuately spaced parts punched outwardly from the offset rim flange in a general direction toward the center of the disc so as to form air scoops, the metal of the rim and flange also being 3 depressed from the base of each scoop to the free edge of the flange to form an integral continuation of the said air scoops.

4. A unit brush supporting and cooling member as set forth in claim 3 further defined in that hearing hubs 5 are preferably punched outwardly on the rim between said depressed parts.

5. A unit brush supporting and cooling member as set forth in claim 3 further defined in that the rim has portions between said scoop formations forced outwardly 10 to form hubs for engaging the brush assembly.

References Cited in the file of this patent UNITED STATES PATENTS Murray Dec. 13, Mollica Aug. 15, Richards Oct. 17, Blair et al. Nov. 21, Kingsbury Ian. 30, Richards Nov. 6, Goldberg Apr. 7, Kanter May 12, 

